- Bring back the scarier Batman that lurks in the shadows from BTAS, B89 and BB (or the comics, for that matter). But no over the top bat-voice.
- More supernatural and sci-fi themed villains.
- Add some sidekicks and allies to make the world feel bigger... Nightwing, Catwoman, Batgirl, Zatanna... even Green Arrow and/or Black Canary, why the hell not.
- Improve the fight scenes.
- This is supposed to be #5 but I can't think of anything else right now.